Class 562/415 - Gas phase

Subclass of Class 562 - Organic compounds -- part of the class 532-570 series
Definition: Processes wherein the oxidation is conducted in a gas or
No. of patents: 35
Last issue date: 07/15/2008

Number	Title	Issue Date
7399882	Optimized liquid-phase oxidation Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reacti...	07/15/2008
7390921	Optimized liquid-phase oxidation Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reacti...	06/24/2008
7381836	Optimized liquid-phase oxidation Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reacti...	06/03/2008
7371866	Preparation of aromatic and heteroaromatic carboxylic acids by catalytic ozonolysis A process for catalytically oxidizing alkylaromatic compounds of the formula (I) Ar—CH2—R where Ar is an optionally substituted, aromatic or heteroaromatic 5-membered or 6-membered ring or a ring system having up to 20 carbon atoms...	05/13/2008
7371894	Optimized liquid-phase oxidation Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reacti...	05/13/2008
7361784	Optimized liquid-phase oxidation Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reacti...	04/22/2008
7358389	Oxidation system employing internal structure for enhanced hydrodynamics Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reacti...	04/15/2008
7355068	Oxidation system with internal secondary reactor Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reacti...	04/08/2008
7338918	Catalyst having a silver-vanadium oxide phase and a promoter phase A catalyst is described which has a catalytically active composition which contains a phase A and a phase B in the form of three-dimensional delimited regions, wherein phase A is a silver-vanadium oxide bronze and phase B a mixed oxide phase based on titanium dioxid...	03/04/2008
6852879	Method of removing iron oxide deposits from the surface of titanium components Disclosed is a method and solvent composition capable of removing iron oxide deposits from the surface of titanium components without substantially damaging the underlying titanium component. Iron oxide deposits may be removed from the surface of a titanium componen...	02/08/2005
6768013	Intrinsically safe oxidation process A novel process for the direct oxidation of hydrogen and hydrocarbons is disclosed, where the explosion risks inherent in gas phase oxidations are substantially eliminated. Gaseous oxidation reactants are soluble in a first reaction solvent phase such as a perfluoro...	07/27/2004
6765113	Production of aromatic carboxylic acids A process for the production of an aromatic carboxylic acid comprising contacting in the presence of a catalyst, within a continuous flow reactor, one or more precursors of the aromatic carboxylic acid with an oxidant, such contact being effected with said precursor...	07/20/2004
5811588	Process for the preparation of 3-phenylpropanal Process for the preparation of 3-phenylpropanal in which cinnamaldehyde is hydrogenated with the aid of a Pd-containing catalyst in the presence of a small amount of water. A high yield and a high selectivity are obtained in a commercially attractive proc...	09/22/1998
5550284	Production method for alkoxynaphthalenecarboxylic acid Alkoxynaphthalenecarboxylic acid is produced by a process comprising the addition of 1,3-butadiene to alkoxyalkylbenzene to yield an adduct. The adduct is cyclized in the presence of an acid catalyst to alkoxyalkyltetralin. The tetralin derivative is then...	08/27/1996
5504218	Method for production pyromellitic anhydride A method for producing efficiently on a commercial scale pyromellitic anhydride having high purity and suffering only sparing coloration in a high yield from a raw material of high concentration is provided. By the use of a multilayer catalyst formed by p...	04/02/1996
5442103	Process for producing 2,6-naphthalenedicarboxylic acid A process for producing 2,6-naphthalenedicarboxylic acid by oxidizing 2,6-dimethylnaphthalene by molecular oxygen in the presence of a catalyst including cobalt, manganese and bromine. The oxidation reaction is performed by using a 2,6-dialkylnaphthalene ...	08/15/1995
5387699	Process for preparing pyromellitic dianhydride The invention relates to a process for preparing pyromellitic dianhydride (PMDA) by heterogeneously catalyzed oxidation in the gas phase by means of a gas containing molecular oxygen. The process involves oxidizing benzaldehydes which are 2,4,5-trialkylat...	02/07/1995
5274126	Partially fluorinated tetracarboxylic acid and the dianhydride thereof, a process for their preparation and their use A compound of the formula ##STR1## and the dianhydride thereof are prepared by air oxidation in the presence of a catalyst mixture composed of at least 2 heavy metal salts and also bromine in an acid organic medium. The compounds can be employed for ...	12/28/1993
5136104	Method for production of substituted benzaldehyde From a methoxy-, tertiary butyl-, or phenoxy-substituted toluene, a corresponding substituted benzaldehyde is obtained by the catalytic gas-phase oxidation of the substituted toluene with a molecular oxygen-containing gas in the presence of a catalyst com...	08/04/1992
4939296	Process for the production of catalytically-active metallic glasses Catalytically-active metallic glasses containing at least one element from a subgroup of the periodic system and at least one element from a main group of the periodic system. Process for the production of catalytically-active metallic glasses where the m...	07/03/1990
4912233	Para- or meta-terphenyltetracarboxylic acid, dianhydride thereof and process for preparing the same Disclosed are a para- or meta-terphenyl-3,4,3",4"-tetracarboxylic acid or a dianhydride and a process for preparing the same. The para- or meta-terphenyl-3,4,3",4"-tetracarboxylic acid or a dianhydride thereof according to the present invention is a novel...	03/27/1990
4885116	Substituted 1,1,1-triaryl-2,2,2-trifluoroethanes and processes for their synthesis Synthetic procedures to tetraalkyls, tetraacids and dianhydrides substituted 1,1,1-triaryl-2,2,2-trifluoroethanes which comprises: (1) 1,1-bis(dialkylaryl)-1-aryl-2,2,2-trifluoroethane, (2) 1,1-bis(dicarboxyaryl)-1-aryl-2,2,2-trifluoroethane or (3) cyclic...	12/05/1989
4863888	Catalyst containing cobalt boron and oxygen and optionally aluminum of preparation and process The preparation, structure, and properties of solid inorganic materials containing cobalt, boron, oxygen and, optionally, aluminum, is described. Also described is the use of such materials in catalytic compositions for the conversion of organic compounds...	09/05/1989
4735789	Process for the production of catalytically-active metallic glasses Catalytically-active metallic glasses containing at least one element from a subgroup of the periodic system and at least one element from a main group of the periodic system. Process for the production of catalytically-active metallic glasses where the m...	04/05/1988
4675440	Process for preparing purified, virtually odorless solid benzoic acid The invention relates to a process for preparing purified, virtually odorless, solid benzoic acid obtained from toluene by oxidation with a gas containing molecular oxygen, by means of a treatment using an inert gas or gas mixture, wherein the benzoic aci...	06/23/1987
4665200	Method for preparing pyromellitic acid and/or pyromellitic anhydride In a method for the preparation of pyromellitic acid or its anhydride by catalytic vapor phase oxidation of a tetra-C1 -C4 -alkylbenzene using a catalyst comprising catalytically active material composed of 1 to 20 parts by weight of...	05/12/1987
4547587	Process for the preparation of pharmaceutical benzoic acid Pharmaceutical benzoic acid is prepared from raw benzoic acid made of oxidation of toluene with an oxygen containing gas, the process is characterized in that the oxidation reaction product is contacted with at least 1 m3 per kg of benzoic acid...	10/15/1985
4539425	Process for the preparation of benzoic acid Benzoic acid is prepared by oxidation of toluene with an oxygen containing gas, the process is characterized in that the oxidation reaction product is subjected to an extraction with a gas of which the critical temperature is lower than 435 K, this being ...	09/03/1985
4487962	Preparation of methacrylic acid by gas phase oxidation of methacrolein An oxidation catalyst wherein the catalytically active component has the general formula where X is Cr and/or Fe, Y is Nb, Z is Na, Li, K and/or Rb, a is 0.1-4, b is 0.001-1, c is 0.05-2, d is 0.05-4, e is 0.1-5, f is 0-2, g is 0-3 and h is 0-2, and x is ...	12/11/1984
4435598	Process for the catalytic oxidation of propylene to acrylic acid An improved process for the catalytic oxidation of propylene to acrylic acid the improvement comprising conducting the process in the presence of an effective amount of hydroquinone. The improved process is particularly applicable to the aqueous liquid ph...	03/06/1984
4404397	High conversion of C₃ and C₄ olefins to corresponding unsaturated aldehydes and acids with stable molybdenum catalysts A stabilized heteropoly molybdate catalyst precursor in calcined form and containing anionic molybdenum in defect state is surface impregnated with certain metal cations. The stabilized precursor is one obtained by incorporating into the reaction product ...	09/13/1983
4342876	Method for oxidation of p-xylene and method for preparing dimethylterephthalate A novel vertical induced circulation reactor is utilized to carry out the oxidation of p-xylene and p-methyltoluate with air in the presence of a catalyst to produce p-toluic acid and monomethylterephthalate (MMT). A novel method for preparation of dimeth...	08/03/1982
4137259	Catalytic gas phase oxidation of toluene to benzaldehyde and/or benzoic acid A catalyst mass of silver vanadate and iron vanadate, optionally also including at least one rare earth metal vanadate, is used in the vapor phase oxidative conversion of toluene to benzaldehyde and/or benzoic acid using oxygen or ozone and steam accordin...	01/30/1979
3993690	Method of obtaining aromatic tri-or-tetracarboxylic acids A method of obtaining aromatic tri- or tetracarboxylic acids characterized in that tri- or tetraalkylbenzenes or the derivatives thereof with a heteroatom in the side chain, are oxidized by oxygen or an oxygen-containing gas in the vapor phase in the pres...	11/23/1976
3946067	Process for the preparation of aromatic aldehydes A process is described for the preparation of aromatic aldehydes such as benzaldehyde or substituted benzaldehydes involving the vapor phase oxidation of aralkyl compounds such as toluene or substituted toluenes, respectively, at temperatures of less than...	03/23/1976

PatentStorm

Bizarre Patents

PatentStorm News

Class 562/415 - Gas phase